update savings icon

[danielleolgin]

https://www.notion.so/bten/Savings-Icon-019a60800ee749f19f844a3424d6e8a5#c21af8ebab184d8aa02cc135098b7f9e

[danielleolgin]

@RazTeve can you attach the icon you want?

[Schellbach]

I like the icon on notion link